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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [net/] [ax25/] [ax25_std_timer.c] - Blame information for rev 17

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
 * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
 * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
 */
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
 
void ax25_std_heartbeat_expiry(ax25_cb *ax25)
{
        struct sock *sk=ax25->sk;
 
        if (sk)
                bh_lock_sock(sk);
 
        switch (ax25->state) {
        case AX25_STATE_0:
                /* Magic here: If we listen() and a new link dies before it
                   is accepted() it isn't 'dead' so doesn't get removed. */
                if (!sk || sock_flag(sk, SOCK_DESTROY) ||
                    (sk->sk_state == TCP_LISTEN &&
                     sock_flag(sk, SOCK_DEAD))) {
                        if (sk) {
                                sock_hold(sk);
                                ax25_destroy_socket(ax25);
                                bh_unlock_sock(sk);
                                sock_put(sk);
                        } else
                                ax25_destroy_socket(ax25);
                        return;
                }
                break;
 
        case AX25_STATE_3:
        case AX25_STATE_4:
                /*
                 * Check the state of the receive buffer.
                 */
                if (sk != NULL) {
                        if (atomic_read(&sk->sk_rmem_alloc) <
                            (sk->sk_rcvbuf / 2) &&
                            (ax25->condition & AX25_COND_OWN_RX_BUSY)) {
                                ax25->condition &= ~AX25_COND_OWN_RX_BUSY;
                                ax25->condition &= ~AX25_COND_ACK_PENDING;
                                ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
                                break;
                        }
                }
        }
 
        if (sk)
                bh_unlock_sock(sk);
 
        ax25_start_heartbeat(ax25);
}
 
void ax25_std_t2timer_expiry(ax25_cb *ax25)
{
        if (ax25->condition & AX25_COND_ACK_PENDING) {
                ax25->condition &= ~AX25_COND_ACK_PENDING;
                ax25_std_timeout_response(ax25);
        }
}
 
void ax25_std_t3timer_expiry(ax25_cb *ax25)
{
        ax25->n2count = 0;
        ax25_std_transmit_enquiry(ax25);
        ax25->state   = AX25_STATE_4;
}
 
void ax25_std_idletimer_expiry(ax25_cb *ax25)
{
        ax25_clear_queues(ax25);
 
        ax25->n2count = 0;
        ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
        ax25->state   = AX25_STATE_2;
 
        ax25_calculate_t1(ax25);
        ax25_start_t1timer(ax25);
        ax25_stop_t2timer(ax25);
        ax25_stop_t3timer(ax25);
 
        if (ax25->sk != NULL) {
                bh_lock_sock(ax25->sk);
                ax25->sk->sk_state     = TCP_CLOSE;
                ax25->sk->sk_err       = 0;
                ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
                if (!sock_flag(ax25->sk, SOCK_DEAD)) {
                        ax25->sk->sk_state_change(ax25->sk);
                        sock_set_flag(ax25->sk, SOCK_DEAD);
                }
                bh_unlock_sock(ax25->sk);
        }
}
 
void ax25_std_t1timer_expiry(ax25_cb *ax25)
{
        switch (ax25->state) {
        case AX25_STATE_1:
                if (ax25->n2count == ax25->n2) {
                        if (ax25->modulus == AX25_MODULUS) {
                                ax25_disconnect(ax25, ETIMEDOUT);
                                return;
                        } else {
                                ax25->modulus = AX25_MODULUS;
                                ax25->window  = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
                                ax25->n2count = 0;
                                ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
                        }
                } else {
                        ax25->n2count++;
                        if (ax25->modulus == AX25_MODULUS)
                                ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
                        else
                                ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
                }
                break;
 
        case AX25_STATE_2:
                if (ax25->n2count == ax25->n2) {
                        ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
                        ax25_disconnect(ax25, ETIMEDOUT);
                        return;
                } else {
                        ax25->n2count++;
                        ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
                }
                break;
 
        case AX25_STATE_3:
                ax25->n2count = 1;
                ax25_std_transmit_enquiry(ax25);
                ax25->state   = AX25_STATE_4;
                break;
 
        case AX25_STATE_4:
                if (ax25->n2count == ax25->n2) {
                        ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
                        ax25_disconnect(ax25, ETIMEDOUT);
                        return;
                } else {
                        ax25->n2count++;
                        ax25_std_transmit_enquiry(ax25);
                }
                break;
        }
 
        ax25_calculate_t1(ax25);
        ax25_start_t1timer(ax25);
}

Line No.	Rev	Author	Line
1	3	xianfeng	`/*`
2			`* This program is free software; you can redistribute it and/or modify`
3			`* it under the terms of the GNU General Public License as published by`
4			`* the Free Software Foundation; either version 2 of the License, or`
5			`* (at your option) any later version.`
6			`*`
7			`* Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)`
8			`* Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)`
9			`* Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)`
10			`* Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)`
11			`*/`
12			`#include <linux/errno.h>`
13			`#include <linux/types.h>`
14			`#include <linux/socket.h>`
15			`#include <linux/in.h>`
16			`#include <linux/kernel.h>`
17			`#include <linux/timer.h>`
18			`#include <linux/string.h>`
19			`#include <linux/sockios.h>`
20			`#include <linux/net.h>`
21			`#include <net/ax25.h>`
22			`#include <linux/inet.h>`
23			`#include <linux/netdevice.h>`
24			`#include <linux/skbuff.h>`
25			`#include <net/sock.h>`
26			`#include <net/tcp_states.h>`
27			`#include <asm/uaccess.h>`
28			`#include <asm/system.h>`
29			`#include <linux/fcntl.h>`
30			`#include <linux/mm.h>`
31			`#include <linux/interrupt.h>`
32
33			`void ax25_std_heartbeat_expiry(ax25_cb *ax25)`
34			`{`
35			`struct sock *sk=ax25->sk;`
36
37			`if (sk)`
38			`bh_lock_sock(sk);`
39
40			`switch (ax25->state) {`
41			`case AX25_STATE_0:`
42			`/* Magic here: If we listen() and a new link dies before it`
43			`is accepted() it isn't 'dead' so doesn't get removed. */`
44			`if (!sk \|\| sock_flag(sk, SOCK_DESTROY) \|\|`
45			`(sk->sk_state == TCP_LISTEN &&`
46			`sock_flag(sk, SOCK_DEAD))) {`
47			`if (sk) {`
48			`sock_hold(sk);`
49			`ax25_destroy_socket(ax25);`
50			`bh_unlock_sock(sk);`
51			`sock_put(sk);`
52			`} else`
53			`ax25_destroy_socket(ax25);`
54			`return;`
55			`}`
56			`break;`
57
58			`case AX25_STATE_3:`
59			`case AX25_STATE_4:`
60			`/*`
61			`* Check the state of the receive buffer.`
62			`*/`
63			`if (sk != NULL) {`
64			`if (atomic_read(&sk->sk_rmem_alloc) <`
65			`(sk->sk_rcvbuf / 2) &&`
66			`(ax25->condition & AX25_COND_OWN_RX_BUSY)) {`
67			`ax25->condition &= ~AX25_COND_OWN_RX_BUSY;`
68			`ax25->condition &= ~AX25_COND_ACK_PENDING;`
69			`ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);`
70			`break;`
71			`}`
72			`}`
73			`}`
74
75			`if (sk)`
76			`bh_unlock_sock(sk);`
77
78			`ax25_start_heartbeat(ax25);`
79			`}`
80
81			`void ax25_std_t2timer_expiry(ax25_cb *ax25)`
82			`{`
83			`if (ax25->condition & AX25_COND_ACK_PENDING) {`
84			`ax25->condition &= ~AX25_COND_ACK_PENDING;`
85			`ax25_std_timeout_response(ax25);`
86			`}`
87			`}`
88
89			`void ax25_std_t3timer_expiry(ax25_cb *ax25)`
90			`{`
91			`ax25->n2count = 0;`
92			`ax25_std_transmit_enquiry(ax25);`
93			`ax25->state = AX25_STATE_4;`
94			`}`
95
96			`void ax25_std_idletimer_expiry(ax25_cb *ax25)`
97			`{`
98			`ax25_clear_queues(ax25);`
99
100			`ax25->n2count = 0;`
101			`ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);`
102			`ax25->state = AX25_STATE_2;`
103
104			`ax25_calculate_t1(ax25);`
105			`ax25_start_t1timer(ax25);`
106			`ax25_stop_t2timer(ax25);`
107			`ax25_stop_t3timer(ax25);`
108
109			`if (ax25->sk != NULL) {`
110			`bh_lock_sock(ax25->sk);`
111			`ax25->sk->sk_state = TCP_CLOSE;`
112			`ax25->sk->sk_err = 0;`
113			`ax25->sk->sk_shutdown \|= SEND_SHUTDOWN;`
114			`if (!sock_flag(ax25->sk, SOCK_DEAD)) {`
115			`ax25->sk->sk_state_change(ax25->sk);`
116			`sock_set_flag(ax25->sk, SOCK_DEAD);`
117			`}`
118			`bh_unlock_sock(ax25->sk);`
119			`}`
120			`}`
121
122			`void ax25_std_t1timer_expiry(ax25_cb *ax25)`
123			`{`
124			`switch (ax25->state) {`
125			`case AX25_STATE_1:`
126			`if (ax25->n2count == ax25->n2) {`
127			`if (ax25->modulus == AX25_MODULUS) {`
128			`ax25_disconnect(ax25, ETIMEDOUT);`
129			`return;`
130			`} else {`
131			`ax25->modulus = AX25_MODULUS;`
132			`ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];`
133			`ax25->n2count = 0;`
134			`ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);`
135			`}`
136			`} else {`
137			`ax25->n2count++;`
138			`if (ax25->modulus == AX25_MODULUS)`
139			`ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);`
140			`else`
141			`ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);`
142			`}`
143			`break;`
144
145			`case AX25_STATE_2:`
146			`if (ax25->n2count == ax25->n2) {`
147			`ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);`
148			`ax25_disconnect(ax25, ETIMEDOUT);`
149			`return;`
150			`} else {`
151			`ax25->n2count++;`
152			`ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);`
153			`}`
154			`break;`
155
156			`case AX25_STATE_3:`
157			`ax25->n2count = 1;`
158			`ax25_std_transmit_enquiry(ax25);`
159			`ax25->state = AX25_STATE_4;`
160			`break;`
161
162			`case AX25_STATE_4:`
163			`if (ax25->n2count == ax25->n2) {`
164			`ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);`
165			`ax25_disconnect(ax25, ETIMEDOUT);`
166			`return;`
167			`} else {`
168			`ax25->n2count++;`
169			`ax25_std_transmit_enquiry(ax25);`
170			`}`
171			`break;`
172			`}`
173
174			`ax25_calculate_t1(ax25);`
175			`ax25_start_t1timer(ax25);`
176			`}`

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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [net/] [ax25/] [ax25_std_timer.c] - Blame information for rev 17